Unnamed tropical depression (1921)
Unnamed tropical depression peaked at unknown kt in the South Pacific between April 1, 1921 and April 9, 1921, and made landfall.
Radar
Reflectivity now over Unnamed tropical depression. Open it to see storms, cones and warnings on the map.
Radar mosaic and map layers from NOAA MRMS. Boundaries from the Iowa Environmental Mesonet.
The storm
- Basin
- South Pacific
- Dates
- April 1, 1921 to April 9, 1921
- Peak strength
- Tropical Depression
- Landfall
- Yes
- Accumulated cyclone energy
- 0.0
- Identifier
- 1921091S12147
Deaths and damage
No source this site reads publishes a machine-readable casualty or damage figure for a storm of this era. The National Hurricane Center’s season tables begin in 1995 and carry deaths and damage only from 2005 in the Atlantic and 2020 in both basins; the US Storm Events record begins in 1996.
Track
| Time (UTC) | Position | Wind | Pressure | Status |
|---|---|---|---|---|
| Apr 1, 12:00 | 12.0S 146.5E | Not reported | ||
| Apr 1, 18:00 | 12.0S 146.4E | Not reported | ||
| Apr 2, 00:00 | 12.1S 146.2E | Not reported | ||
| Apr 2, 06:00 | 12.2S 145.9E | Not reported | ||
| Apr 2, 12:00 | 12.3S 145.6E | Not reported | ||
| Apr 2, 18:00 | 12.4S 145.3E | Not reported | ||
| Apr 3, 00:00 | 12.6S 144.8E | Not reported | ||
| Apr 3, 06:00 | 13.0S 144.1E | Not reported | ||
| Apr 3, 12:00 | 13.6S 143.3E | Not reported | ||
| Apr 3, 18:00 | 14.2S 142.6E | Not reported | ||
| Apr 4, 00:00 | 14.8S 142.0E | Not reported | ||
| Apr 4, 06:00 | 15.1S 141.6E | Not reported | ||
| Apr 4, 12:00 | 15.3S 141.3E | Not reported | ||
| Apr 4, 18:00 | 15.6S 141.1E | Not reported | ||
| Apr 5, 00:00 | 15.9S 140.9E | Not reported | ||
| Apr 5, 06:00 | 16.2S 140.7E | Not reported | ||
| Apr 5, 12:00 | 16.6S 140.6E | Not reported | ||
| Apr 5, 18:00 | 16.9S 140.4E | Not reported | ||
| Apr 6, 00:00 | 17.3S 140.3E | Not reported | ||
| Apr 6, 06:00 | 17.8S 140.3E | Not reported | ||
| Apr 6, 12:00 | 18.4S 140.3E | Not reported | ||
| Apr 6, 18:00 | 19.1S 140.3E | Not reported | ||
| Apr 7, 00:00 | 19.8S 140.7E | Not reported | ||
| Apr 7, 06:00 | 20.8S 141.5E | Not reported | ||
| Apr 7, 12:00 | 21.7S 142.4E | Not reported | ||
| Apr 7, 18:00 | 22.6S 143.4E | Not reported | ||
| Apr 8, 00:00 | 23.5S 144.4E | Not reported | ||
| Apr 8, 06:00 | 24.6S 145.5E | Not reported | ||
| Apr 8, 12:00 | 25.8S 146.7E | Not reported | ||
| Apr 8, 18:00 | 27.1S 147.7E | Not reported | ||
| Apr 9, 00:00 | 28.4S 148.7E | Not reported | ||
| Apr 9, 06:00 | 30.0S 149.9E | Not reported | ||
| Apr 9, 12:00 | 31.6S 151.2E | Not reported | ||
| Apr 9, 18:00 | 33.2S 152.4E | Not reported |
Other South Pacific storms of 1921
- Unnamed tropical depressionSouth Pacific · 1921
- Unnamed tropical depressionSouth Pacific · 1921
- Unnamed tropical depressionSouth Pacific · 1921
- Unnamed tropical depressionSouth Pacific · 1921
- Unnamed tropical depressionSouth Pacific · 1921
- Unnamed tropical depressionSouth Pacific · 1921
- Unnamed tropical depressionSouth Pacific · 1921
- Unnamed tropical depressionSouth Pacific · 1921
- Unnamed tropical depressionSouth Pacific · 1921
- Unnamed tropical depressionSouth Pacific · 1921
What this means
A best track is the record a warning agency settles on after the storm, not what it said at the time: position, maximum sustained wind and central pressure every six hours, revised against every observation that came in later. Category is the Saffir-Simpson scale, which runs from Category 1 at 64 kt to Category 5 at 137 kt and reads wind only, so it says nothing about surge or rain. Accumulated cyclone energy adds up the square of the wind through the storm's life, so it counts strength and duration together.
Sources
Storm history from NOAA NCEI’s International Best Track Archive for Climate Stewardship (IBTrACS), which merges the official best track of every warning agency. Live storms, cones, watches and warnings from the National Hurricane Center and the Central Pacific Hurricane Center. Archived radar from NOAA’s Level II archive.